Search results

Had a mixed year this year, the sprint frame was so hard to ride, plus I don't think the engine mounts I made were man enough, had a lot of vibration. I've just put the engine in a standard frame to see if it's the engine, Just started it up and getting one of the problems I had, which is on...

Here's mine, all edges have been smoothed out

I always use dellorto pumper carbs, but have manifolds made for them

It's the dot on the others idea the needs to be level with the face that you should be looking at ,it's too easy to get it a tooth out guessing if the notch is upright

447 starting on the serial number does not define which rods are in it, there were several European models which would have 533 rods in starting 447

Depends on how steep the ramps are, if its a nice smooth cam probably be fine, if they are really aggressive like on the 250-40 then no it would be for race only

https://www.xs650.com/threads/anybody-recognize-this-cam.38585/ Jack has posted some useful information on measuring cam height on here, biggest problem comparing your measurements is your doing it in mm where nearly all cams are measured in imperial, can you post a picture showing the end of...

Can you post a picture of the profile of the cam, You need to take the width from the height then times it by something think its 2.6 or something like that to get the lift. It's definitely not megacycle as there's no space after 250

Does it have a date stamped on it? First numbers 250 look like mega cycle numbers, if its an old cam they have different end numbers, there was one on ebay recently that was 50 x9

Perhaps it was built to be supercharged or turboed, that would count for the low compression,

Sounds like someone has put together a load of bits, crankcase half's should have matching numbers and the head should as well,

There was a thread on here years ago where the piston skirt had lots of indentations from starting to drill a hole almost like a golf ball but more spaced out,

These two are on xscafe site, totally different in design with the top one having cut the back of the engine off with the other bike having two full engines by the look of

Seen pictures of a double engined one but never seen any of it being run, would be interesting to see how much better it would be

Manifolds are about 4 1/2 inches, length to end of velocity stack around 9 1/4 "

Just about finished now, unfortunately due to a fatality where I race there are still investigations ongoing as to what happened so won't get to run it until next year

If the cranks been welded its possible the weld is too thick and catching the case, spin it a few times take yhe cases apart and see where and what is catching as there will be catch marks on the casing

I don't have top speed recorded, only speed at 1/8 and 1/4, mine is obviously c94